晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : //usr/include/sound/sof/header.h
/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
/*
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * Copyright(c) 2018 Intel Corporation. All rights reserved.
 */

#ifndef __INCLUDE_UAPI_SOUND_SOF_USER_HEADER_H__
#define __INCLUDE_UAPI_SOUND_SOF_USER_HEADER_H__

#include <linux/types.h>

/**
 * struct sof_abi_hdr - Header for all non IPC ABI data.
 * @magic: Magic number for validation
 *	   for IPC3 data: 0x00464F53 ('S', 'O', 'F', '\0')
 *	   for IPC4 data: 0x34464F53 ('S', 'O', 'F', '4')
 * @type: module specific parameter
 *	  for IPC3: Component specific type
 *	  for IPC4: parameter ID (param_id) of the data
 * @size: The size in bytes of the data, excluding this struct
 * @abi: SOF ABI version. The version is valid in scope of the 'magic', IPC3 and
 *	 IPC4 ABI version numbers have no relationship.
 * @reserved: Reserved for future use
 * @data: Component data - opaque to core
 *
 * Identifies data type, size and ABI.
 * Used by any bespoke component data structures or binary blobs.
 */
struct sof_abi_hdr {
	__u32 magic;
	__u32 type;
	__u32 size;
	__u32 abi;
	__u32 reserved[4];
	__u32 data[0];
}  __attribute__((packed));

#define SOF_MANIFEST_DATA_TYPE_NHLT 1

/**
 * struct sof_manifest_tlv - SOF manifest TLV data
 * @type: type of data
 * @size: data size (not including the size of this struct)
 * @data: payload data
 */
struct sof_manifest_tlv {
	__le32 type;
	__le32 size;
	__u8 data[];
};

/**
 * struct sof_manifest - SOF topology manifest
 * @abi_major: Major ABI version
 * @abi_minor: Minor ABI version
 * @abi_patch: ABI patch
 * @count: count of tlv items
 * @items: consecutive variable size tlv items
 */
struct sof_manifest {
	__le16 abi_major;
	__le16 abi_minor;
	__le16 abi_patch;
	__le16 count;
	struct sof_manifest_tlv items[];
};

#endif

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